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more WTX sketch

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This commit is contained in:
merlokk 2019-02-01 21:27:43 +02:00
parent ab01d0c73d
commit c6daa4acc9
1 changed files with 56 additions and 14 deletions
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70
targets/stm32l432/src/nfc.c
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@ -54,20 +54,6 @@ void process_int0(uint8_t int0)
} }
// WTX on/off:
// sends/receives WTX frame to reader every `WTX_time` time in ms
// works via timer interrupts
// WTX: f2 01 91 40 === f2(S-block + WTX, frame without CID) 01(from iso - multiply WTX from ATS by 1) <2b crc16>
bool WTX_on(int WTX_time)
{
return true;
}
bool WTX_off()
{
return true;
}
bool ams_wait_for_tx(uint32_t timeout_ms) bool ams_wait_for_tx(uint32_t timeout_ms)
{ {
uint32_t tstart = millis(); uint32_t tstart = millis();
@ -223,6 +209,62 @@ void nfc_write_response_chaining(uint8_t req0, uint8_t * data, int len)
} }
} }
// WTX on/off:
// sends/receives WTX frame to reader every `WTX_time` time in ms
// works via timer interrupts
// WTX: f2 01 91 40 === f2(S-block + WTX, frame without CID) 01(from iso - multiply WTX from ATS by 1) <2b crc16>
static bool WTX_sent;
static bool WTX_fail;
bool WTX_on(int WTX_time)
{
WTX_sent = false;
WTX_fail = false;
return true;
}
bool WTX_off()
{
if (WTX_fail)
return false;
return true;
}
// executes twice a period. 1st for send WTX, 2nd for check the result
bool WTX_process()
{
uint8_t wtx[] = {0xf2, 0x01};
if (WTX_fail)
return false;
if (!WTX_sent)
{
nfc_write_frame(wtx, sizeof(wtx));
WTX_sent = true;
return true;
}
else
{
uint8_t data[32];
int len;
if (ams_receive_with_timeout(0, data, sizeof(data), &len))
{
WTX_fail = true;
return false;
}
if (len != 2 || data[0] != 0xf2 || data[1] != 0x01)
{
WTX_fail = true;
return false;
}
WTX_sent = false;
return true;
}
}
int answer_rats(uint8_t parameter) int answer_rats(uint8_t parameter)
{ {